Skip to content
OpenAdvisories
Critical RHSA-2026:26428 8 CVEs

Red Hat Security Advisory: kernel-rt security update

Published Jun 17, 2026 · Updated Nov 13, 2026

Ecosystem: Red Hat

Fixed packages 28

ReleasePackageFixed in
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt 0:4.18.0-553.134.1.rt7.475.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-core 0:4.18.0-553.134.1.rt7.475.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-debug 0:4.18.0-553.134.1.rt7.475.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-debug-core 0:4.18.0-553.134.1.rt7.475.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-debug-debuginfo 0:4.18.0-553.134.1.rt7.475.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-debug-devel 0:4.18.0-553.134.1.rt7.475.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-debug-kvm 0:4.18.0-553.134.1.rt7.475.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-debug-modules 0:4.18.0-553.134.1.rt7.475.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-debug-modules-extra 0:4.18.0-553.134.1.rt7.475.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-debuginfo 0:4.18.0-553.134.1.rt7.475.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-debuginfo-common-x86_64 0:4.18.0-553.134.1.rt7.475.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-devel 0:4.18.0-553.134.1.rt7.475.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-kvm 0:4.18.0-553.134.1.rt7.475.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-modules 0:4.18.0-553.134.1.rt7.475.el8_10
Red Hat · RHEL 8 enterprise_linux:8::nfv kernel-rt-modules-extra 0:4.18.0-553.134.1.rt7.475.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt 0:4.18.0-553.134.1.rt7.475.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt-core 0:4.18.0-553.134.1.rt7.475.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt-debug 0:4.18.0-553.134.1.rt7.475.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt-debug-core 0:4.18.0-553.134.1.rt7.475.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt-debug-debuginfo 0:4.18.0-553.134.1.rt7.475.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt-debug-devel 0:4.18.0-553.134.1.rt7.475.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt-debug-modules 0:4.18.0-553.134.1.rt7.475.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt-debug-modules-extra 0:4.18.0-553.134.1.rt7.475.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt-debuginfo 0:4.18.0-553.134.1.rt7.475.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt-debuginfo-common-x86_64 0:4.18.0-553.134.1.rt7.475.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt-devel 0:4.18.0-553.134.1.rt7.475.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt-modules 0:4.18.0-553.134.1.rt7.475.el8_10
Red Hat · RHEL 8 enterprise_linux:8::realtime kernel-rt-modules-extra 0:4.18.0-553.134.1.rt7.475.el8_10

Vulnerabilities 8

  • Critical 9.8
    CVE-2026-31669

    mptcp: fix slab-use-after-free in __inet_lookup_established

    In the Linux kernel, the following vulnerability has been resolved: mptcp: fix slab-use-after-free in __inet_lookup_established The ehash table lookups are lockless and rely on SLAB_TYPESAFE_BY_RCU to guarantee socket memory stability during RCU read-side cri…

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  • High 8.8
    CVE-2026-43110

    wifi: brcmfmac: validate bsscfg indices in IF events

    In the Linux kernel, the following vulnerability has been resolved: wifi: brcmfmac: validate bsscfg indices in IF events brcmf_fweh_handle_if_event() validates the firmware-provided interface index before it touches drvr->iflist[], but it still uses the raw b…

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  • High 8.8
    CVE-2026-46056

    Bluetooth: hci_event: fix potential UAF in SSP passkey handlers

    In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_event: fix potential UAF in SSP passkey handlers hci_conn lookup and field access must be covered by hdev lock in hci_user_passkey_notify_evt() and hci_keypress_notify_evt(), o…

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  • High 8.8
    CVE-2026-46125

    wifi: mac80211: remove station if connection prep fails

    In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211: remove station if connection prep fails If connection preparation fails for MLO connections, then the interface is completely reset to non-MLD. In this case, we must not keep …

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  • High 8.8
    CVE-2026-46152

    wifi: mac80211: drop stray 'static' from fast-RX rx_result

    In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211: drop stray 'static' from fast-RX rx_result ieee80211_invoke_fast_rx() is documented as safe for parallel RX, but its per-invocation rx_result is declared static. Concurrent ca…

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu Azure Linux
  • High 7.8
    CVE-2026-31786

    Buffer overflow in drivers/xen/sys-hypervisor.c

    In the Linux kernel, the following vulnerability has been resolved: Buffer overflow in drivers/xen/sys-hypervisor.c The build id returned by HYPERVISOR_xen_version(XENVER_build_id) is neither NUL terminated nor a string. The first causes a buffer overflow as …

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  • High 7.8
    CVE-2026-43329

    netfilter: flowtable: strictly check for maximum number of actions

    In the Linux kernel, the following vulnerability has been resolved: netfilter: flowtable: strictly check for maximum number of actions The maximum number of flowtable hardware offload actions in IPv6 is: * ethernet mangling (4 payload actions, 2 for each ethe…

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu
  • Unscored —
    CVE-2026-31787 Public exploit

    xen/privcmd: fix double free via VMA splitting

    In the Linux kernel, the following vulnerability has been resolved: xen/privcmd: fix double free via VMA splitting privcmd_vm_ops defines .close (privcmd_close), but neither .may_split nor .open. When userspace does a partial munmap() on a privcmd mapping, th…

    Linux Linux linux-raspi2 linux-hwe Linux Debian Ubuntu

References

  • article
    https://access.redhat.com/security/updates/classification/#important
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2461503
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2464092
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2464096
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2467014
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2468124
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2482181
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2482563
  • report
    https://bugzilla.redhat.com/show_bug.cgi?id=2482608
  • advisory
    https://security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_26428.json
  • report
    https://access.redhat.com/security/cve/CVE-2026-31669
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2026-31669
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2026-31669
  • article
    https://lore.kernel.org/linux-cve-announce/2026042406-CVE-2026-31669-0e0d@gregkh/T
  • report
    https://access.redhat.com/security/cve/CVE-2026-31786
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2026-31786
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2026-31786
  • article
    https://lore.kernel.org/linux-cve-announce/2026043031-CVE-2026-31786-826a@gregkh/T
  • report
    https://access.redhat.com/security/cve/CVE-2026-31787
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2026-31787
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2026-31787
  • article
    https://lore.kernel.org/linux-cve-announce/2026043034-CVE-2026-31787-f6cc@gregkh/T
  • report
    https://access.redhat.com/security/cve/CVE-2026-43110
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2026-43110
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2026-43110
  • article
    https://lore.kernel.org/linux-cve-announce/2026050624-CVE-2026-43110-7309@gregkh/T
  • report
    https://access.redhat.com/security/cve/CVE-2026-43329
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2026-43329
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2026-43329
  • article
    https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-43329.mbox
  • report
    https://access.redhat.com/security/cve/CVE-2026-46056
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2026-46056
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2026-46056
  • article
    https://lore.kernel.org/linux-cve-announce/2026052754-CVE-2026-46056-0ff1@gregkh/T
  • report
    https://access.redhat.com/security/cve/CVE-2026-46125
  • advisory
    https://www.cve.org/CVERecord?id=CVE-2026-46125
  • advisory
    https://nvd.nist.gov/vuln/detail/CVE-2026-46125
  • article
    https://lore.kernel.org/linux-cve-announce/2026052816-CVE-2026-46125-b5d0@gregkh/T
  • report
    https://access.redhat.com/security/cve/CVE-2026-46152